Hematocrit and plasma osmolality values of young-of-year shortnose sturgeon following acute exposures to combinations of salinity and temperature

Ziegeweid, Jeffrey R.; Black, Marsha C.

doi:10.1007/s10695-009-9374-y

Cited by 8 publications

(7 citation statements)

References 15 publications

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“…to those previously reported for green sturgeon (Allen and Cech 2007;Kültz 2009, 2014;Allen et al 2011) and for other sturgeon species (McEnroe and Cech 1985;Cataldi et al 1995;Altinok et al 1998;Martinez-Alvarez et al 2002;Jarvis and Ballantyne 2003;Semenova and Vyushina 2006;Zarejabad et al 2008;Ziegeweid and Black 2008;Mojazi Amiri et al 2009). Although the present salinity exposure lasted for only 5 d and did not simulate the physiological consequences of long-term hyperosmotic exposure, these data underscore the high osmoregulatory capacity of green sturgeon at an early age.…”

Section: Effects Of Salinity Exposure On Osmoregulationsupporting

confidence: 79%

Effect of Nutritional Status on the Osmoregulation of Green Sturgeon (Acipenser medirostris)

Haller

Hung²,

Lee³

et al. 2015

Physiological and Biochemical Zoology

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Anthropogenic climate change is linked to food web and salinity fluctuations in estuarine environments. Both decreased nutritional status and environmental salinity influence the physiological tolerance and health of fish populations; however, limited information on the interaction of these two factors and their physiological consequences is available. The green sturgeon (Acipenser medirostris) is a species of special concern in California, and the southern distinct population segment is listed as threatened. To test the hypothesis that poor nutrition negatively affects osmoregulation, juvenile green sturgeon (222 d posthatch) were randomly assigned to four feed restriction groups (12.5%, 25%, 50%, and 100% of the optimal feeding rate for 4 wk). Fish were then acutely exposed to 0-, 8-, 16-, or 32-ppt salinities and sampled at three time points (12, 72, or 120 h). Feed restriction significantly (P < 0.05) decreased specific growth rate, feed efficiency, condition factor, whole-body lipids, and protein content as well as plasma glucose, triglycerides, and proteins. Furthermore, feed restriction, salinity concentration, and salinity exposure time had significant effects on hematological indexes (hematocrit, hemoglobin), plasma values (osmolality, Na(+), K(+), Cl(-), glucose, lactate, cortisol), enzymatic activity (gill and pyloric ceca Na(+)/K(+) ATPase), and morphology of gill mitochondria-rich cells. The largest disturbances were observed at the highest salinity treatments across all feeding regimes. In addition, the interaction between feed restriction and acute salinity exposure at the highest salinity treatment resulted in high mortality rates during the first 72 h of salinity exposure. Evaluating the interactions of these environmental stressors and their implications on green sturgeon physiological tolerance will inform restoration and management efforts in rapidly changing estuarine environments.

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Section: Effects Of Salinity Exposure On Osmoregulationsupporting

confidence: 79%

Effect of Nutritional Status on the Osmoregulation of Green Sturgeon (Acipenser medirostris)

Haller

Hung²,

Lee³

et al. 2015

Physiological and Biochemical Zoology

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“…Although the osmoregulatory response to salinity has never been assessed in splittail, the magnitudes of plasma osmolality, muscle moisture, NKA activity and haematocrit values for wild juvenile splittail at 14‰ were similar to those of many fish species, including white sturgeon ( Acipenser transmontanus ; McEnroe and Cech, 1985 ; Mojazi Amiri et al ., 2009 ), Italian sturgeon ( Acipenser naccarii ; Cataldi et al ., 1995 ; Martinez-Alvarez et al ., 2005 ), Gulf of Mexico sturgeon ( Acipenser oxyrinchus ; Altinok et al ., 1998 ) and shortnose sturgeon ( Acipenser bravirostrum ; Jarvis and Ballantyne, 2003 ; Ziegeweid and Black, 2008 ). Maximal values of plasma osmolality (452 ± 23 ’mmol kg −1 ) and NKA activity [1.9 ± 0.2 µmol ADP (mg protein) −1 h −1 ] for 14‰ treatments are comparable to those of channel catfish ( Ictalurus punctatus ), for which plasma osmolality and NKA activity increased to ∼450 mmol kg −1 and 3.5 µmol ADP (mg protein) −1 h −1 , respectively when held in 40% sea water (∼13‰ salinity; Eckert et al ., 2001 ).…”

Section: Discussionmentioning

confidence: 99%

Inter-population differences in salinity tolerance and osmoregulation of juvenile wild and hatchery-born Sacramento splittail

et al. 2016

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Genetically-distinct populations of the Sacramento Splittail, a minnow endemic to the San Francisco Estuary, exhibit different physiological responses and tolerances to salinity as juveniles. Population-level responses correspond with known salinity habitat differences suggesting some degree of local adaptation. Further studies are needed to elucidate these differences, but these data suggest a potential need for population-specific conservation and management strategies.

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“…Some studies on other acipenserids have reported decreases in haematocrit following long‐term salinity exposure (Zarejabad et al , ), yet others have found no changes (Altinok et al , ; Martinez‐Alvarez et al , ; Rodriguez et al , ; Allen & Cech, ) and still others have reported increases (Jarvis & Ballantyne, ). One short‐term study reported decrease in haematocrit in young of the year A. brevirostrum following 48 h in salinities of 24 (Ziegeweid & Black, ). It appears that these blood variables do not show a clearly predictable response to salinity exposures in acipenserids.…”

Section: Discussionmentioning

confidence: 99%

“…Other studies assessing the effects of salinity on A. brevirostrum have largely been limited to brackish water (i.e. not full-strength seawater) challenges (Jarvis et al, 2001;Jarvis & Ballantyne, 2003;Ziegeweid et al, 2008;Ziegeweid & Black, 2010). If indeed the effect of salinity is not linear (i.e.…”

Section: Discussionmentioning

confidence: 99%

“…In nature, A. brevirostrum enter salt water at 8-10 years of age (total length, L T , c. 45 cm and mass, M , c. 400 g) (Dadswell, 1979;Bemis & Kynard, 1997) but it has been shown that <2 year-old A. brevirostrum survive exposure to moderate salinity (20) throughout a 10-week exposure (Jarvis et al, 2001;Jarvis & Ballantyne, 2003). To date, the literature on the salinity tolerance of juvenile A. brevirostrum has either focused on chronic exposure (Jarvis et al, 2001;Jarvis & Ballantyne, 2003) or used limited, mainly mortality-based endpoints with very small juveniles (Jenkins et al, 1993;Ziegeweid et al, 2008;Ziegeweid & Black, 2010). The nature and timeline of the acute, multi-level responses to salinity exposure in juveniles is yet to be understood.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Oxygen consumption and haematology of juvenile shortnose sturgeon Acipenser brevirostrum during an acute 24 h saltwater challenge

Penny

Kieffer

2014

Journal of Fish Biology

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This study focused on the acute physiological responses to saltwater exposure in juvenile shortnose sturgeon Acipenser brevirostrum. In two separate laboratory experiments, 2 year-old A. brevirostrum were exposed to either full (32) or half-strength (16) seawater for up to 24 h. First, oxygen consumption rates were used to estimate the metabolic costs over 24 h. Secondly, blood and muscle samples were analysed at 6, 12 and 24 h for water loss, various measures of osmoregulatory status (plasma osmolality and ions) and other standard haematological variables. Juveniles exposed to full-strength seawater showed significant decreases in oxygen consumption rates during the 24 h exposure. Furthermore, seawater-exposed fish had significantly increased plasma osmolality, ions (Na(+) and Cl(-)) and a 17% decrease in total wet mass over the 24 h exposure period. To a lesser extent, increases in osmolality, ions and mass loss were observed in fish exposed to half-strength seawater but no changes to oxygen consumption. Cortisol was also significantly increased in fish exposed to full-strength seawater. While plasma protein was elevated following 24 h in full-strength seawater, haemoglobin, haematocrit and plasma glucose levels did not change with increased salinity. These results imply an inability of juvenile A. brevirostrum to regulate water and ions in full-strength seawater within 24 h. Nonetheless, no mortality occurred in any exposure, suggesting that juvenile A. brevirostrum can tolerate short periods in saline environments.

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Hematocrit and plasma osmolality values of young-of-year shortnose sturgeon following acute exposures to combinations of salinity and temperature

Cited by 8 publications

References 15 publications

Effect of Nutritional Status on the Osmoregulation of Green Sturgeon (Acipenser medirostris)

Effect of Nutritional Status on the Osmoregulation of Green Sturgeon (Acipenser medirostris)

Inter-population differences in salinity tolerance and osmoregulation of juvenile wild and hatchery-born Sacramento splittail

Oxygen consumption and haematology of juvenile shortnose sturgeon Acipenser brevirostrum during an acute 24 h saltwater challenge

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